1、答案:had an advantage over the rest of us
解析:1)詞組:have an advantage of(比…有利)
2)時態:根據前半句的knew,此處應使用一般過去時
2、答案:make sure the books (should) be returned in time
解析:1)從句:主語從句it is important that …
2)虛擬語氣:此處主語從句應使用should + 動詞原形,should可以省略
3)語態:此處“按時歸還”應使用被動語態be returned
4)詞組:make sure(確認)
3、答案:come/go into effect
解析:詞組:come/go into effect(生效)
4、答案:go in for teaching
解析:詞組:go in for(從事)
5、答案:reducing the strain of cultural shock
解析:1)動名詞:assist somebody in doing something
2)詞組:cultural shock(文化沖擊)